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.Management Sciences
Category: Enzymes
The activity of this plasma enzyme is responsible virtually for all plasma cholesterol esters in humans_______________?
A. Lecithin cholesterol acyl transferase (LCAT)
B. Pyrophospho mevalonate decarboxylase
C. HMG CoA reductase
D. Phospho mevalonate kinase
Enzymes concerned with the citric acid cycle are found in______________?
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Non-particulate cytoplasm
Which of the following is correct of the pyruvate dehydrogenase enzyme complex ?
A. It is present in cytoplasm
B. Catalyzes the conversion of pyruvate to oxaloacetate
C. Requires TPP as cofactor
D. Catalyzes a reversible reaction
Acetyl Co-A acts as a substrate for all the enzymes except______________?
A. HMG-Co A synthase
B. Malic enzyme
C. Malonyl CoA synthetase
D. Fatty acid synthetase
The combination of main supporting enzyme is called______________?
A. Apoenzyme
B. Coenzyme
C. Holoenzyme
D. Constitutive enzyme
Enzymes are classified according to_________________?
A. Action on substrate
B. Action of coenzymes
C. Nature of the enzymes
D. All of the above
Km of an enzyme is_____________?
A. Dissociation constant
B. The normal physiological substrate concentration
C. Substrate concentration at half maximal velocity
D. Numerically identical for all isozymes that catalyses a given reaction
Key glycolytic enzymes_____________?
A. Phosphofructokinase
B. Hexokinase
C. Pyruvate kinase
D. Glucose 1,6 diphosphatase
An example of layses is_____________?
A. Glutamine synthetase
B. Fumarase
C. Cholinesterase
D. Amylase
Fraction of CPK is an enzyme that is elevated in a myocardial infarct is____________________?
A. MM fraction
B. MB fraction
C. BB fraction
D. Both MM and BB fraction
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